How do I get newly updated timezone data to be used, rather than the old one?

My /var/db/timezone/tz/2021a.3.0/zoneinfo was updated to version 2022a on 18 March 2022. The old one is still being read, that is 2021a. The new links are shown here:–

:timezone johnhall$ ls
total 0
lrwxr-xr-x  1 root  wheel   35  1 Nov 11:44 icutz -> /var/db/timezone/tz/2021a.3.0/icutz
drwxr-xr-x  4 root  wheel  128 25 Mar 22:06 tz
lrwxr-xr-x  1 root  wheel   29 25 Mar 22:06 tz_latest -> /var/db/timezone/tz/2022a.1.0
lrwxr-xr-x  1 root  wheel   38  1 Nov 11:44 zoneinfo -> /var/db/timezone/tz/2021a.3.0/zoneinfo

I have no idea how to remove/recreate the zoneinfo link to point to /var/db/timezone/tz/2022a.1.0 nor any idea if the icutz entry needs to be changes as well :( Note: the /var/db/timezone/tz fofolder now contains the 2 timezone folders, old and new:- MacPRO:tz johnhall$ ls -l total 0 drwxr-xr-x 5 root wheel 160 26 Oct 11:30 2021a.3.0 drwxr-xr-x 5 root wheel 160 18 Mar 14:28 2022a.1.0 I've come up with a solution. I guess it was as a failed TZ update from Apple this month. disable SIP (Recovery mode, terminal : csrutil disable ) $ unlink /var/db/timezone/icutz $ ln -Fs /var/db/timezone/tz/2022a.1.0/icutz /var/db/timezone/icutz $ unlink /var/db/timezone/zoneinfo $ ln -Fs /var/db/timezone/tz/2022a.1.0/zoneinfo /var/db/timezone/zoneinfo My folders now look like this:- MacPRO:~ johnhall$ cd /var/db/timezone MacPRO:timezone johnhall$ ls -laOA@ total 0 dr-xr-xr-x@ 6 root wheel restricted 192 27 Mar 19:41 . com.apple.rootless 8 drwxr-xr-x 112 root wheel sunlnk 3584 27 Mar 19:38 .. lrwxr-xr-x 1 root wheel restricted 35 27 Mar 19:40 icutz -> /var/db/timezone/tz/2022a.1.0/icutz drwxr-xr-x 3 root wheel restricted 96 27 Mar 19:22 tz lrwxr-xr-x 1 root wheel restricted 29 25 Mar 22:06 tz_latest -> /var/db/timezone/tz/2022a.1.0 lrwxr-xr-x 1 root wheel restricted 38 27 Mar 19:41 zoneinfo -> /var/db/timezone/tz/2022a.1.0/zoneinfo MacPRO:timezone johnhall$ cd tz MacPRO:tz johnhall$ ls -laOA@ total 0 drwxr-xr-x 3 root wheel restricted 96 27 Mar 19:22 . dr-xr-xr-x@ 6 root wheel restricted 192 27 Mar 19:41 .. com.apple.rootless 8 drwxr-xr-x 5 root wheel restricted 160 18 Mar 14:28 2022a.1.0